I beta tested this game, so it's hard to be objective about it. I think I would give it a 4.5/5, so I rounded up.
Faute De Servo combines several game ideas that I love, including waking up in a lab-like environment with no clue what's going on (like Babel) and gaining powers by devouring random things (like the under-played Mangiasaur).
Much of the game consists of figuring out the action system, as well as the backstory of your location. I found this somewhat confusing (which is why I gave 4.5/5) but the presentation is so slick that it makes up for it.
There's also a good deal of humorous banter in the game, which I enjoyed. It is derivved from a cast of characters with distinct personalities and varying levels of intelligence.
This is definitely worth playing, both for the overall game concept and for the nifty implementation.